Assis! It is 3 stretcher cases or 4 sitting, it was important that the soldiers knew that the car was limited on how many could be carried, as there was room for many more than 4. The first photo show haw the word ambulance evolved from a hospital to a form af transportation. People saw these photos of the cars that drove for the American Ambulance, which was a hospital run by Americans in France, and they thought that the cars were American ambulances. These were run by the American Field Service, which served the American Ambulance in the field. The AFS is still one of the few reputable organizations that arrange exchanges of foreign students, it was an off shoot of what they did in both wars, as the boys who served in the AFS were recruited from universities and other schools in America.